Pipe-cutting machine.



L. R. BLAGKMORE.

PIPE GUTTING MACHINE.

APPLICATION FILED FEB. 4, 1911.

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Gin/U ATTORNEYS L. R. BLAUK MORE.

PIPE CUTTING MACHINE. APPLICATION FILED FEB.4, 1911. 1,042,998. w Patented Oct. 29, 1912.

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7 @JW M BY ATTORNEYS UNITED STATES PATENT OFFICE.

LAWRENCE R. BLACKMORE, OF MCKEESPORT, PENNSYLVANIA.

PIPE-CUTTING MACHINE.

This invention is an improvement in pipe cutting machines, and the invention has for an object to provide a novel construction for driving the base or supporting rollers as Well as for driving the cam for directly operating the cutter.

The invention also seeks to provide a novel means for adjusting the operation of the cutter to suit the diameter of the pipe being cut.

The invention also provides for operating the cutter.

The invention has for further objects, other improvements and consists in certain novel constructions and combinations of parts as will be hereinafter described and claimed.

In the drawings Figure 1 is a side elevation of a machine embodying my invention. Fig. 2 is a front elevation thereof, parts being-broken away. Fig. 3 is an elevation of the machine from the side shown in Fig. 2.

a novel means In carrying out my invention, I provide a suitable frame A having a base B and a head 0, the latter having vertical guide ways in which is movable vertically the slide D carrying the disk cutter E, the latter being free to revolve on bearings F supported at the lower end of the slide D and the slide D being connected at.its upper end by a link D with the lever D having a counterbalancing weight D as best shown in Fig. 1. By this construction, the cutter and its slide when lowered to the position shown in Fig. 1, may be readjusted to its elevated position when released, as more fully described hereinafter.

The main frame supports bearingsA in which is journaled the drive shaft G which may be operated in any suitable manner and is geared by a pinion G with a pinion H on what may be termed the master shaft H. journaled in suitable bearings in the frame A near the lower end thereof, as shown in Figs. 1 and 2. This master shaft extends through the mainframe and is provided on one side thereof with a sprocket wheel meshed by a sprocket chain I, which extends Specification of Letters Patent.

Application filed February 4, 1911; SeriaI No. 606,586.

opposite that Patented Oct. 29, 1912.

upwardly and forwardly and meshes with a sprocket wheel I on a shaft 1 which shaft I also has a pinion I geared with and driving the base rollers J which form a support for the pipe being driven and a means for turning the said pipe in contact with the cutter E when the latter is lowered against the pipe.

As best shown in Fig. 3, the gear I on the shaft I and the gears J on theshafts J of the rollersJ are arranged on one side of the main frame while the said rollers J are arranged. on the opposite side of the frame and the shafts J extend beyond the rollers J and are supported at their outer ends by the arms K of brackets K secured to the main frame, as shown in Fig. 3. The shafts J are also provided at their ends opposite the rollers J with rollers J similar to the rollers J and alined therewith and cooperating with the rollers J in supporting a pipe during the cuttingoperation. It should be noted, however, that the rollers J are grooved at J 3 ,to receive the cutting disk E while such a groove is not necessary in the rollers J However, by extending ,the shafts J through the main frame and suga- .porting the rollers J and J on said sha on opposite sides of the main frame, I secure a broad base for supporting the pi e.

The shaft H is also provi ed with a sproc et pinion geared with a sprocket chain L, which chain L extends upwardly and around a sprocket Wheel M on a counter-shaft M. This shaft M is journaled in. the main frame and has the sprocket wheel M on one side of the said frame and a gear wheel M on the opposite side of the said frame, the said-gear wheel M meshing with the gear wheel M on a shaft M journaled in the main frame, the shaft M being provided on the sideof the main frame opposite the gear M with a cam N. This cam N reciprocates a slide rod 0 movable vertically in guides 0' carried b the main frame and having at its lower on a roller 0 bearing a' ainst the cam N inthe operation of the mac inc. As

the shaft M is revolved, the cam N will'lift' the slide rod and permitthe sametoloweras more fully described hereinafter.

The roller 0 is connected adjustabl with the slide rod and the saida'od is pre erably .made in sections with an upper adjustable section 0 threaded into the upper end of the bod of the rod and secured in any suitable aolyustment by a jam nut 0*.

A link P is pivoted at its upper end to the upper section 0 of the slide rod 0 and at its lower end to a rocker arm Q forming a par-t of the means for operating the cutter slide, as shown in F ig. 1.

The rocker arm Q, is secured adjustably to a shaft R journaled in the framing and on this shaft R is secured a pinion or gear R which meshes with a rack D on the cutter slide so that the said gear R will give the downward or cutting stroke to the slide D and will permit the counter-balancing devices D, -D and D to elevate or re-adjust the said slide D.

For gaging or adjusting the height of the cover to pipes of diflerent diameters, I secure the pinion or gear R adjustably in connection with the rocker Q, and in doingthis I employ a segment S fixed to the shaft R and having a series of openings S any one of which may be entered bythe fastening device T which secures the segment adjustably to the rocker Q, and so secures the adjustable connection between the pinion or gear It and the rocker desirable for securing the adjustment of the cutter tosuit pipes of different sizes.

In the operation of the described construction, it will be noticed that the slide rod 0 will be forced upward by the action of-the cam N, which is given motion in the manner before described. As the link P pulls up the outer end of the rocker Q, the teeth of the pinion R meshing .with the cutter slide D, will force said slide downward in its cutting stroke, the slide being readjusted by the counterbalancing devices.

As best shown in Fig. 1, I provide an idler U for tightening the sprocket chain L, the said idler being carried bybeariiigs on a plate U pivoted at U and slotted at its swinging end at U for the passage of the bolt-U by which the tightener may be secured in any desired adjustment.

I claim:

1. In a machine, substantially as described,

. the combination of a framing, a pair of bed rollers for supporting the work to be operated on, means for driving these rollers whereby to turn the said work, a cutting disk opposing the said'rollers, a slide carrying said disk and having a toothed rack, counterbalancing devices for lifting or readjusting said slide, a shaft having a pinion or gear meshing with the rack of the slide, a segment secured to said shaft, a rocker,

means'securing said segment adjustably to.

the rocker whereby the rocker may be secured in any desired relation to the pinion or gear, a llnk connected at one end with the rocker, an operating slide to which said link is connected, a roller at the lower end of said slide, a cam operating upon said roller to elevate the slide, and means for operating the cam, substantially as set forth.

ated on, means for driving these rollers whereby to turn the said work, a cutting disk opposing the said rollers, a slide carry: ing said disk and having-a toothed rack, counterbalancing devicesfor lifting or readjusting said slide, a shaft having a pinion or gear meshing with the rack of the slide, a segment secured to said shaft, a rocker, means securing said segment adjustably to the rocker whereby the rocker may be secur in any desired relation to the pinion or gear and means for operating the rocker, substantially as set forth,

3. In a machine, substantially as described, the combination of a framing, shafts journaled in the framing and projecting at their opposite ends beyond the same, said shafts being spaced apart, rollers opposite each other on their respective ends of the said ers, aslide carrying said cutter, gearing on one side of the main frame between the master shaft and the supportin rollers, a cam for operating the cutter sha and gearing between the master shaft and said cam and on the. opposite side of the main frame from the said first gearing, substantially as set forth.

5. The combination, substantially as herein described, of a cutter, a pinion or gear for moving the cutter in the operative stroke of the latter, means for operating the pinion or gear to a determined extent, and means for adjusting the pinion or gear circumferentially with respect to its operating means whereby the cutter may be operate to the determined extent and the limits of 1 its movement may be yaried substantially as adjusting the operative engagement of the gear with the rack, and means for operating the gear to give the operative stroke to the cutter, substantially as set forth.

8. The combination in a machine, substantially as described, of a cutter, a slide for operating the cutter, a rack and pinion for moving the slide, an arm for rocking the pinion and a segment between the arm and pinion whereby the relation of the pinion to 10 the arm may be varied substantially as set LAWRENCE R. BLAOKMORE. Witnesses:

A.'T. DARR, H. E.-MARKER.

- forth. 

